Explication is the process of making something clearer. When you carefully explain your performance art piece to your mystified parents, you can describe what you're doing as an explication.
The noun explication is closely related to "explicit," which essentially means "crystal clear." Both words come from the Latin explicitus, "unobstructed," which itself is a variant of explicare, "unfold or unravel." A good explication unravels any doubt or confusion and results in a crystal clear understanding, whether the explication involves performance art, the plot of a novel, or the complicated route to your grandmother's house.